Costco’s farm-raised shrimp is generally safe to eat, and it carries more third-party oversight than most grocery store shrimp. That said, no imported shrimp is risk-free, and Costco’s supply chain has had at least one notable safety incident. Understanding where the shrimp comes from, what certifications apply, and what the real contamination risks look like will help you make a confident decision at the freezer aisle.
Where Costco’s Shrimp Comes From
Costco’s Kirkland Signature frozen shrimp is supplied by Kader Exports Private Limited, an India-based seafood company that owns shrimp farms and processing plants across the country. India is one of the world’s largest shrimp exporters, and the vast majority of shrimp sold in the U.S. is imported and farm-raised. This is standard for the industry, not unique to Costco.
Certifications and Supply Chain Oversight
Costco requires more from its shrimp suppliers than many retailers do. The company is a founding member of the Seafood Task Force, an organization that monitors social and environmental conditions in higher-risk seafood supply chains. All of Costco’s shrimp suppliers in Asia are members of this task force.
For farm-raised products, Costco works toward sourcing from farms certified by the Aquaculture Stewardship Council (ASC). ASC certification covers water quality, responsible feed sourcing, disease prevention, animal welfare, and fair treatment and pay for workers. Costco describes ASC as “the most robust and credible aquaculture certification program” available. Where suppliers haven’t yet met full ASC standards, Costco supports Aquaculture Improvement Projects designed to close that gap over time.
These certifications don’t guarantee every bag of shrimp is perfect, but they do place Costco’s sourcing standards above what you’d find with many generic frozen shrimp brands.
The 2020 Salmonella Recall
In 2020, the FDA found salmonella in shrimp produced by Kader Exports, the same supplier behind Kirkland Signature shrimp. Costco recalled frozen cooked deveined shrimp sold between late February and mid-May of that year. The contamination was attributed to cross-contamination during processing, and several other retailers that used the same supplier issued recalls too, including BJ’s Wholesale Club and Tops.
No food supply chain is immune to contamination events. The recall was handled through standard FDA channels, and the issue was traced to a processing problem rather than a systemic farming concern. Still, it’s worth knowing that Costco’s primary shrimp supplier has had a documented food safety failure.
Mercury Levels in Farm-Raised Shrimp
If mercury is your concern, shrimp is one of the safest seafood choices available. Average mercury concentrations in shrimp sit around 0.012 parts per million, which is extremely low compared to fish like tuna, swordfish, or king mackerel. A study published in PMC that tested store-bought shrimp found no significant difference in mercury levels between farm-raised and wild-caught varieties. Whether your shrimp is farmed or wild, the mercury exposure is negligible.
Antibiotic Residues: The Bigger Concern
The more relevant safety question with imported farm-raised shrimp involves antibiotic residues. Shrimp farms, particularly in Asia, sometimes use antibiotics to prevent disease in densely stocked ponds. Several of these drugs are banned from use in food animals in the United States, including chloramphenicol and nitrofurans, because their residues pose serious health risks. Chloramphenicol residues, for example, are linked to increased cancer risk and can trigger aplastic anemia, a rare but potentially fatal condition where bone marrow stops producing blood cells. Nitrofuran compounds are considered so dangerous that no safe maximum residue level has been established.
Between 2002 and 2019, the U.S. averaged 341 shrimp import refusals per year, and antibiotic contamination was cited in over 1,600 of those cases. That made antibiotics the second most common reason for refusing shrimp imports, behind general sanitation and spoilage issues. The catch is that the FDA only tests a small fraction of imported seafood, which means some contaminated shipments likely reach store shelves undetected.
This is an industry-wide problem, not a Costco-specific one. Costco’s ASC certification requirements and Seafood Task Force membership provide more protection than buying unbranded imported shrimp from a discount store, but no retailer can guarantee that every shipment has been individually tested for banned substances.
How Costco Compares to Other Retailers
Among major U.S. retailers, Costco’s shrimp sourcing practices fall on the more transparent and rigorous end of the spectrum. The ASC certification standards, Seafood Task Force membership, and publicly stated sustainability commitments give you more assurance than you’d get from most store brands. That said, “more rigorous than average” still means relying on a global supply chain with known gaps in regulatory oversight.
If you want to minimize risk further, look for the ASC certification logo on the specific bag you’re buying, since not all Kirkland shrimp products may carry it at any given time. You can also reduce bacterial contamination risk by cooking shrimp to an internal temperature of 145°F, which kills salmonella and other common pathogens. For cooked, ready-to-eat shrimp products (the type involved in the 2020 recall), check sell-by dates and keep them properly frozen until use.
The Bottom Line on Safety
Costco’s farm-raised shrimp is as safe as, and likely safer than, most imported shrimp available in the U.S. The mercury risk is essentially zero. The antibiotic residue risk is low but not zero, and that applies to virtually all imported farm-raised shrimp regardless of retailer. Costco’s supplier certifications and supply chain oversight reduce, but don’t eliminate, that risk. For most people eating shrimp a few times a month, the practical health concern is minimal.